by contributions to your pbs station from viewers like you. and by the corporation for public broadcasting. major support for frontline is provided by the john d. and catherine t. macarthur foundation, committed to building a more just, verdant and peaceful world. more information is available at macfound.org. additial fding iprovid by the park foundation, dedicated to heightening public awareness of critical issues. and by the frontline journalism fund, supporting investigative reporting and enterprise journalism. >> although this downturn started in the housing sector and inhe financial sector, you're seeing a lot of things being hit. >> today's numbers suggest job losses are accelerating. >> that's the biggest loss since 1974. the unemployment rate... >> narrator: in 2009, wall street bankers were on the defensive. the great american mortgage bubble had burst. >> this is a huge amount of money. >> narrator: the economy was in ruins and wall street bankers were being blamed. bankers admitted they had miscalculated. but they were also worried that they could be held criminally liable for fraud.